We're in the process of switching over to a new system of invoicing.

我们正在转用新的发票制度。

《牛津词典》

A company representative wrote back and told me the airline was switching over the plastic to paper cups on all of its 1,200 daily flights.

一位公司代表回信告诉我，该航空公司将把每天1200个航班的塑料杯换成纸杯。

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Also, a large frequency spectrum (698-806 MHz) was freed by switching over from analog TV to the digital one.

此外，从模拟电视信号到数字电视信号的切换也释放了广阔的频道(698 - 806mhz)。

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For its part, Germany is closing down all its plants and switching over to alternative fuels.

FORBES: Three Months Later, Japan Still in Meltdown

But he's also in the process of switching over 68 application servers from NT to Unix.

CNN: Some see ploy in Microsoft NT rename

The ship's engines momentarily went silent, an indication he was switching over from gasoline to gas.

FORBES: The long, loud history of hydrogen as a motor fuel.